Governor for high-speed engines.



No. 764,228. PATENTED JULY 5, 1904.

' E. A. EDWARDS.

GOVERNOR FOR HIGH PEED ENGINES.

APPLIOATIOH FILED nov. 25. 1901. no MODEL. 2 annn'rs snnm 1.

: atwauto'a Qvitneaaco Wig/(J rm PATENTED JULY 5, 1904.

- E. A. EDWARDS.

- GOVERNOR FOR HIGH SPEED ENGINES.

APPLIUATION FILED NOV. 25, 1901.

2 BHEETS-SHEET 2.

N0 MODEL.

qvil'ncovm attorney) UNITED STATES Patented July 5, 19 C PATENT OFFICE.

ASSIGNMENTS, TO METROPOLITAN TRUST & SAVINGS BANK,

TRUSTEE, A CORPORATION OF ILLINOIS.

GOVERNOR FOR HIGH-SPEED ENGINES.

SPECIFICATION forming part of Letters Patent No. 764,228, dated ly 5,1904.

Application filed November 25, 1901. Serial No. 83,532. (N flde To (t/Zwhom it may concern:

Be it known that I, EDGAR A. EDWARDS, a citizen of the United States,residing at Oincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Governors forHigh-Speed Engines, of which the following is a specification.

My invention relates to the control devices of high-speed engines orother apparatus the speed of which is to be controlled; and my inventionconsists in constructing the governor to be used with high-speedengines, especially steam-turbines, and also in connecting it with thecontrol device, as fully set forth hereinafter and as illustrated in theaccompanying drawings, in which Figure l is a sectional plan ofsufficient of a steam-turbine and governing devices to.

illustrate my invention. Fig. 2 is a side view of the governor. Fig. 3is a longitudinal section thereof; Fig. i, an end View, and Fig. 5 aperspective view, of one of the governor- Wings.

The casing A is suitably constructed to re ceive the wheel (J, mountedupon a shaft B, which is supported in bearings in arms of the casing,which latter is formed to constitute a casing 25, inclosing a governorF, secured to one end of the shaft B. Steam passes through thesupply-pipe 31 to a port 30, which controlled by a cylinder-valve 32,and from the latter the steam passes to a channel 33, leading to a port34, (dotted lines, Fig. 1,) communicating with the nozzle by which steamis directed onto the buckets of the wheel. The governor controls theposition of the valve 32, which is arranged in a sleeve 35 within thechannel 33, the stem 36 passing through a suitable packing-box 37, allthese parts being Within the hollow arm 38 of the casing, extendingparallel to the shaft B,which arm 38 extends from a radial hollow arm40, communicating with the casing 25, and in the hollow arm A0 is alever ll, which communicates motion from the sliding part of thegovernor to the stem 36. The governor is provided with a cross-piece 42,secured to the shaft B and having near the outer extremity bearings 44for the corners of L-shaped wings Gr, each wing having a short centralarm 45 hearing against a sliding block L6 on the end of a rod 47,extending axially beyond the shaft B and with forked arms 48suliiciently separated to receive between them a casing 49, throughwhich said rod slides, said casing containing a spring 50, bearing onthe end of the casing and also on the block 46. The casing 49 isrecessed for the passage of the arms 45, and the casing, arms, spring,block 46, and rod L7 all turn together with the crosspicce 42. In orderto permit the rotation of these parts while connecting the rod 47 to thelever 41, the rod 47 is provided with a head confined Within a rcccssina block 552, which has a recess for a cross-piece 53, connecting theblock 52 with the end of the lever 41. The ends of the arms IS of thewings Or normally make contact, as shown in Fig. 2, in which positionthe spring tends to maintain them by forcing inward the block 46. hen,however, the shiift B is put in motion and as the latter tendstoincrease its speed, there is a tendency of the arms 48 of the wings (ito fly outward, rocking the Wings upon their bearings 44, compressingthe spring 50, and moving outward the rod I7, imparting a correspondingmovement to the parts connected with the valve 32 and moving the latterto more or less close the steam channel. The contact of the wings willbe maintained until the speed of rotation of the shaft B begins toexceed the proper maximum, when the wings will separate, and the momentthis begins there is imparted a corresponding movement to thecontrol-valve.

It will be seen that in the construction of governor described there areno pivots or pins for supporting the wings G, so that there can be nowearing or lost motion, which is apt to result when pins are used forpivoting the wings to a governor; but, on the contrary, the corners ofthe wings have a direct bearing upon the shoulders 4:4, and if anywearing occurs the wings simply seat themselves upon the new surfaceswithout any lost motion or opportunity for undue play, the spring alwaysmaintaining intimate contact between the surface of the parts which moveupon each other.

By arranging the control-valve 32 to slide parallel to the shaft B, witha lever between the governor at the end of that shaft and the stem ofthe valve, I am enabled to bring the valve very close to the port 34,through which the steam passes to the nozzle, so as to reducecondensation to the very lowest possible limit, while securing suchdirect connection between the valve and the governor that there isopportunity for but little lost motion or wear of parts.

WVhile I have shown such governor in connection with an engine of aparticular construction, it will be evident that it may be employedwherever a high-speed governor is required. It will be seen, further,that the outer arms 48 of the wings of the governor when in normalmeeting position are at an angle to each other. I have found in practicethat this position is important, as there is a much more effectiveoperation if the said arms swing outward from a normal position at anangle to each other than if they are normally parallel to each other andare then carried outward on an increase of speed. To vary the speed, itis necessary to vary the tension of the spring 50. This may be effectedby different means; but as shown the casing 49 is made in two parts, theend portion being externally threaded to engage threads within the sideportion, so that the end portion may be turned as a nut to regulate thespring tension.

For many purposes steam-turbines must be used in more or less exposedsituations, and I have found that when so used the access of dust,moisture, &c., to the parts of the governing apparatus is extremelydetrimental.

It will be seen that by the above construction I inclose all theseparts, and I thereby maintain the governor at a high degree ofefiiciency. \Vhile I prefer to have the valve-casing parallel to theshaft B, this is not always necessary.

WVithout limiting myself to the precise construction and arrangement ofparts shown, I claim as my invention 7 1. The combination in ahigh-speed governor, of a shaft, a cross-piece connected thereto, andL-shaped wings having corner-bearings upon the cross-piece, the outerarms of said wings meeting at an angle to each other, substantially asand for the purpose set forth.

2. The combination with a rotating shaft, of a cross-piece, L-shapedwings having corner-bearings on said cross-piece, inwardlyprojectingarms and a block maintained in contact with said arms by a spring, and arod connected with said block and with the controlvalve of the engine,substantially as set forth.

3. The combination with a rotating shaft, of a cross-piece, L-shapedwings, a rod with a block against which said wings bear, arms 48normally in contact with each other except at predetermined high speeds,and a spring bearing on said block, substantially as set forth.

4. The combination with a rotating shaft, of a cross-piece, L-shapedwings having corner-bearings on said cross-piece, a rod connected tooperate the control-valve of the engine and provided with a block, aspring for maintaining said block in contact with the inner projectingarms of the wings, and a casing inclosing said spring, the outer arms ofthe wings being forked and in contact outside of said casing,substantially as set forth.

5. The combination with the shaft, crosspiece and wings, of a, casingconnected to the cross-piece, an adjustable end for the casing, and aspring interposed between the end and wings the whole being connected toand rotated by the shaft, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDGAR A. EDWVARDS.

VVitn esses:

H. M. GILLMAN, Jr., IV. CLARENCE DUVALL.

